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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ISPRS-Archives</journal-id>
<journal-title-group>
<journal-title>The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences</journal-title>
<abbrev-journal-title abbrev-type="publisher">ISPRS-Archives</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2194-9034</issn>
<publisher><publisher-name>ISPRS</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/isprsarchives-XXXIX-B1-435-2012</article-id>
<title-group>
<article-title>MEASUREMENT OF LARGE-SCALE SOLAR POWER PLANT BY USING IMAGES ACQUIRED BY NON-METRIC DIGITAL CAMERA ON BOARD UAV</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Matsuoka</surname>
<given-names>R.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Nagusa</surname>
<given-names>I.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Yasuhara</surname>
<given-names>H.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Mori</surname>
<given-names>M.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Katayama</surname>
<given-names>T.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Yachi</surname>
<given-names>N.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hasui</surname>
<given-names>A.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Katakuse</surname>
<given-names>M.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Atagi</surname>
<given-names>T.</given-names>
</name>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Research and Development Division, Kokusai Kogyo Co., Ltd., Japan</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Geospatial Information Engineering Division, West Japan Department, Kokusai Kogyo Co., Ltd., Japan</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Civil Engineering Department, General Environmental Technos Co., Ltd., Japan</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Asago Power System Center, Himeji Branch, Kansai Electric Power Co., Inc., Japan</addr-line>
</aff>
<pub-date pub-type="epub">
<day>27</day>
<month>07</month>
<year>2012</year>
</pub-date>
<volume>XXXIX-B1</volume>
<fpage>435</fpage>
<lpage>440</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2012 R. Matsuoka et al.</copyright-statement>
<copyright-year>2012</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/3.0/">https://creativecommons.org/licenses/by/3.0/</ext-link></license-p>
</license>
</permissions>
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<abstract>
<p>This paper reports an experiment conducted in order to investigate the feasibility of the deformation measurement of a large-scale
solar power plant on reclaimed land by using images acquired by a non-metric digital camera on board a micro unmanned aerial
vehicle (UAV). It is required that a root mean squares of errors (RMSE) in height measurement should be less than 26 mm that is 1/3
of the critical limit of deformation of 78 mm off the plane of a solar panel. Images utilized in the experiment have been obtained by
an Olympus PEN E-P2 digital camera on board a Microdrones md4-1000 quadrocopter. The planned forward and side overlap ratios
of vertical image acquisition have been 60 % and 60 % respectively. The planned flying height of the UAV has been 20 m above the
ground level and the ground resolution of an image is approximately 5.0 mm by 5.0 mm. 8 control points around the experiment area
are utilized for orientation. Measurement results are evaluated by the space coordinates of 220 check points which are corner points
of 55 solar panels selected from 1768 solar panels in the experiment area. Two teams engage in the experiment. One carries out
orientation and measurement by using 171 images following the procedure of conventional aerial photogrammetry, and the other
executes those by using 126 images in the manner of close range photogrammetry. The former fails to satisfy the required accuracy,
while the RMSE in height measurement by the latter is 8.7 mm that satisfies the required accuracy. From the experiment results, we
conclude that the deformation measurement of a large-scale solar power plant on reclaimed land by using images acquired by a nonmetric
digital camera on board a micro UAV would be feasible if points utilized in orientation and measurement have a sufficient
number of bundles in good geometry and self-calibration in orientation is carried out.</p>
</abstract>
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